I have got access to a fascinating book called "Les noms de lieux du Limousin, Témoins de l'histoire d'une région" by Marcel Villoutreix, published by the Association des Antiquités Historiques du Limousin, at Limoges in 2002. I don't know if it is publicly available. If anyone wants a place-name looking up, I will try to do it for them. I suspect it would be horribly expensive to buy but should be available from libraries.
"Outside of a dog, a book is man's best friend. (Inside of a dog, it's too dark to read.)" Groucho Marx